3.5 Active Transport Flashcards
Additional energy is needed to transport molecules into and out of a cell against the concentration gradient, this is called…
Active transport
The energy needed comes from…
ATP (an energy-storage molecule made in cellular respiration) [adenosine diphosphate and phosphate]
Carrier proteins are needed for active transport, the molecule binds to the carrier protein;
ATP also binds to the carrier protein
The carrier protein changes shape
Energy from the breakdown of ATP is used to transport the molecule across the membrane, against concentration gradient
As the molecule is released, the carrier protein goes back to…
It’s original shape
Some carrier proteins actively transport one ion into a cell at the same time as another ion is moved out…
Sodium-potassium pump
Sodium-potassium pump uses ATP to remove sodium ions from the cell, at the same time as bringing…
Potassium ions into the cell
